Fiber molding and fibrous binder, and application thereof

A fiber molding with specific fibrous binder properties and recycled fibers addresses the strength and durability issues in FRP production, enabling the creation of strong composite materials.

JP2025162199APending Publication Date: 2025-10-27NIPPON PAPER IND CO LTD
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Patent Information

Application Number
JP2024065329
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-04-15
Publication Date
2025-10-27

AI Technical Summary

Technical Problem

Existing methods for producing fiber-reinforced plastics (FRP) using recycled fibers result in fragmented and short fibers that lack the strength and durability required for FRP materials, and minimizing the binder amount is desired to maximize the properties of the main fiber material.

Method used

A fiber molding comprising a main fiber material and a fibrous binder with specific ratios and properties, including an average fiber length of 0.30 to 2.50 mm and an average fibril perimeter ratio of 25% or more, using fibrillated cellulose fibers as the binder, enhances the strength of the fiber molding.

Benefits of technology

The fiber molding achieves sufficient strength and can be processed into composite materials, such as FRP, even when using recycled fibers, by optimizing the content and properties of the fibrous binder.

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Abstract

To provide a fiber molding having sufficient strength and a composite material using the same, and a fiber molding having sufficient strength using a carbon fiber and a composite material using the same.SOLUTION: A fiber molding processed to a nonwoven fabric, etc., by using a fibrillated fibrous binder is prepared. One embodiment of the fiber molding includes a main fiber material and a fibrous binder, wherein the content ratio of the main fiber material and the fibrous binder is the fibrous binder 1-20 pts.wt. to the main fiber material 100 pts.wt., the mean fiber length of the fibrous binder is 0.30-2.50 mm, and the average fibril boundary length ratio of the fibrous binder is 25% or over.SELECTED DRAWING: Figure 1
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Citation Information

Patent Citations

  • Dispersant for wet type paper, dispersion composition for wet type paper and fiber sheet

    JP2017057511A

  • Heat-resistant paper and process for producing same, fiber-reinforced heat-resistant molded resin, precursor therefor, and processes for producing said molded resin and precursor

    WO2014021366A1